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External crystal oscillator ckt | Cypress Semiconductor

External crystal oscillator ckt

Summary: 1 Reply, Latest post by danaaknight on 16 Apr 2013 06:03 AM PDT
Verified Answers: 0
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user_278462884's picture
35 posts

 Hi All,


I am using a 32.768 kHz ECO for deriving a highly accurate clock. Pls provide me with CL1, CL2 values for a 28-pin DIP CY8C29466 IC. Also, if there are any other constraints/parameters to be included/altered, list out that too. 


I find an app note saying 22pF values for both CL1 & CL2. Is this correct ? 


Please help,



user_14586677's picture
7646 posts

The ap note covers layout and xtal considerations in depth.


Keep in mind when you order a xtal you specifiy load C, or pick

one with rated load C for the circuit you want.


Regards, Dana.

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